Monachino, who had been with the team the last four seasons, essentially became the scapegoat for a defense that ranked last in the NFL in sacks. The Jaguars finished with a franchise-low 14 sacks in 2009 and got picked apart by experienced quarterbacks.

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Cullen takes over a line that includes former first-round draft pick Derrick Harvey and second-rounder Quentin Groves, both of whom struggled in their first two seasons.

Cullen coached at Idaho State last season after spending the previous three years with the Detroit Lions. He was arrested twice in 2006, suspended for a game by the Lions and fined $20,000 by the league.